Why is Photo Black only available separately? The printer and cartridges are fine. It prints.But what is really annoying is the fact that the Photo Black is only available separately and not in the Multipack. Yet even if you are only printing black and white text and therefore one would suppose only using standard black ink, the printer won’t work with the photo black cartridge being empty. It doesn’t even attempt to print.I have replaced the Photo Black in the past and in spite of only printing B&W text the Photo Black runs…